首先,先了解一下SSM框架
看本博客的需要提前分别掌握Spring,SpringMVC,MyBatis的应用,否则看起来会很乏力
按照博客的顺序一步一步走,完成SSM框架的搭建,为了防止有些初学者对于包的创建位置还有些模糊,博客最尾附带了整体项目的结构图
开始搭建
和数据库打交道是必要的事情,所以我们先创建好数据库,使用数据库工具,直接复制粘贴即可
数据库代码
create database ssmIDEA;
use ssmIDEA;
create table user(
id int primary key auto_increment,
name varchar(20),
age int
);
select*from user;
-- 测试数据
insert into user(name,age)values("huang",20);
insert into user(name,age)values("lin",20);
我们需要有一个使用maven管理的web项目
那么我们按照步骤来:new一个新的Project
选择Maven,选择创建Web项目,注意不要选错
输入项目的GroupId,ArtifactId,点击next
选择Maven配置文件,和本地仓库,默认也可以,点击下一步
构建太慢可以添加archetypeCatalog=internal,这里我不添加
输入路径,点击FINISH,点击OK
创建好了之后我们需要新建java,resources包
创建所需要的包,如图所示
开始代码
我们先搞定pom.xml文件(导入坐标并建立依赖)
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.ssm</groupId>
<artifactId>SSM+</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
<name>SSM+ Maven Webapp</name>
<!-- FIXME change it to the project's website -->
<url>http://www.example.com</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.7</maven.compiler.source>
<maven.compiler.target>1.7</maven.compiler.target>
<spring.version>5.0.2.RELEASE</spring.version>
<slf4j.version>1.6.6</slf4j.version>
<log4j.version>1.2.12</log4j.version>
<shiro.version>1.2.3</shiro.version>
<mysql.version>8.0.17</mysql.version>
<mybatis.version>3.5.3</mybatis.version>
</properties>
<dependencies>
<!-- spring -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.6.8</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>compile</scope>
</dependency>
<!--MySql-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>${log4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${slf4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>${slf4j.version}</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.mchange/c3p0 -->
<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.5.5</version>
<type>jar</type>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter</artifactId>
<version>RELEASE</version>
<scope>compile</scope>
</dependency>
</dependencies>
<build>
<finalName>SSM+</finalName>
<pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
<plugins>
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>3.1.0</version>
</plugin>
<!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
<plugin>
<artifactId>maven-resources-plugin</artifactId>
<version>3.0.2</version>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.1</version>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>3.2.2</version>
</plugin>
<plugin>
<artifactId>maven-install-plugin</artifactId>
<version>2.5.2</version>
</plugin>
<plugin>
<artifactId>maven-deploy-plugin</artifactId>
<version>2.8.2</version>
</plugin>
</plugins>
</pluginManagement>
</build>
<modules>
<module>ssm_domain</module>
<module>ssm_dao</module>
<module>ssm_service</module>
<module>ssm_web</module>
</modules>
</project>
接下来是实体类(cn.spring.domain.User.java)
package cn.spring.domain;
public class User {
private Integer id;
private String name;
private Integer age;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
@Override
public String toString() {
return "User{" +
"id=" + id +
", name='" + name + '\'' +
", age=" + age +
'}';
}
}
持久层接口(cn.spring.dao.UserDao.java)
package cn.spring.dao;
import cn.spring.domain.User;
import java.util.List;
public interface UserDao {
//添加用户
public void saveUser(User user);
//查询所有用户
public List<User> findAllUser();
}
业务层接口(cn.spring.service.UserService.java)
package cn.spring.service;
import cn.spring.domain.User;
import java.util.List;
public interface UserService {
//添加用户
public void saveUser(User user);
//查询所有用户
public List<User> findAllUser();
}
Spring框架配置文件(applicationContext.xml)
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<!--配置spring创建容器要扫描的包-->
<context:component-scan base-package="cn.spring">
<!--不扫描Controller注解的类-->
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
</beans>
测试一下Spring框架是否搭建成功
业务层接口实现类UserServiceImpl.java
package cn.spring.service.impl;
import cn.spring.domain.User;
import cn.spring.service.UserService;
import org.springframework.stereotype.Service;
import java.util.List;
@Service("userService")
public class UserServiceImpl implements UserService {
@Override
public void saveUser(User user) {
System.out.println("业务层添加方法被调用");
}
@Override
public List<User> findAllUser() {
System.out.println("业务层查询方法被调用");
return null;
}
}
测试类( cn.spring.test.SpringTest)
package cn.spring.test;
import cn.spring.service.UserService;
import org.junit.jupiter.api.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class SpringTest {
@Test
public void run1(){
ApplicationContext applicationContext=new ClassPathXmlApplicationContext("applicationContext.xml");
UserService userService=(UserService)applicationContext.getBean("userService");
userService.findAllUser();
}
}
运行结果如图所示说明搭建成功
搭建SpringMVC框架
web.xml 中配置核心控制器(DispatcherServlet)
<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd" >
<web-app>
<display-name>Archetype Created Web Application</display-name>
<!--配置核心控制器(DispatcherServlet)-->
<servlet>
<servlet-name>dispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:springmvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!--中文乱码问题-->
<filter>
<filter-name>characterEncodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>characterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>
配置文件(springmvc.xml)
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<!--创建扫描的包-->
<context:component-scan base-package="cn.spring">
<!--只扫描Controller-->
<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
<!--配置视图解析器对象-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
<!--开启SpringMVC注解支持-->
<mvc:annotation-driven/>
</beans>
控制器类(cn.spring.controller.UserController)
package cn.spring.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
@RequestMapping("/user")
public class UserController {
@RequestMapping("/findAll")
public String findAll(){
System.out.println("表现层查询方法被调用");
return "all";
}
}
webapp目录下需要的的jsp文件
index.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<a href="user/findAll">测试查询</a>
</body>
</html>
all.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<h1>查询所有</h1>
</body>
</html>
测试:配置tocmat并运行
运行结果
说明SpringMVC框架搭建成功
整合(Spring+SpringMVC)
web.xml中添加下面的配置,实现整合
<!--配置监听器实现启动服务创建容器->Spring+SpringMVC-->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!--配置文件路径-->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
搭建 Mybatis框架
resources下的数据库文件jdbcConfig.properties
jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ssmidea?serverTimezone=UTC
jdbc.username=root
jdbc.password=010126
MyBatis配置文件SqlConfig.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<properties resource="jdbcConfig.properties"></properties>
<environments default="mysql">`在这里插入代码片`
<environment id="mysql">
<transactionManager type="jdbc"></transactionManager>
<dataSource type="pooled">
<property name="driver" value="${jdbc.driver}"/>
<property name="url" value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
</dataSource>
</environment>
</environments>
<mappers>
<!-- <mapper class="cn.itcast.dao.AccountDao"></mapper>-->
<!--使用package以后这个包中的所有类都可以映射到-->
<package name="cn.spring.dao"/>
</mappers>
</configuration>
测试
修改UserDao.java
package cn.spring.dao;
import cn.spring.domain.User;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Select;
import java.util.List;
public interface UserDao {
//添加用户
@Insert("insert into user(name,age)values(#{name},#{age})")
public void saveUser(User user);
//查询所有用户
@Select("select *from user")
public List<User> findAllUser();
}
测试类(cn.itcast.test.MybatisTest.java)
public class MybatisTest {
@Test
public void run() throws IOException {
InputStream in= Resources.getResourceAsStream("SqlConfig.xml");
SqlSessionFactory sqlSessionFactory=new SqlSessionFactoryBuilder().build(in);
SqlSession sqlSession=sqlSessionFactory.openSession();
UserDao userDao=(UserDao)sqlSession.getMapper(UserDao.class);
List<User> list=userDao.findAllUser();
for (User user:list){
System.out.println("user = " + user);
}
sqlSession.close();
in.close();
}
}
运行结果如下,说明成功
整合(Spring+MyBatis)
修改applicationContext.xml文件
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<!--配置spring创建容器要扫描的包-->
<context:component-scan base-package="cn.spring">
<!--不扫描Controller注解的类-->
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
<!--Spring整合Mybatis-->
<!--配置连接池-->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="com.mysql.cj.jdbc.Driver"></property>
<property name="jdbcUrl" value="jdbc:mysql://localhost:3306/ssm?serverTimezone=UTC"></property>
<property name="user" value="root"></property>
<property name="password" value="010126"></property>
</bean>
<!--SqlSessionFactory-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"></property>
</bean>
<!--配置接口所在包-->
<bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="cn.spring.dao"></property>
</bean>
<!--配置Spring框架的声明式事务管理-->
<!--配置事务管理器-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"></property>
</bean>
<!--事务通知-->
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="find*" read-only="true"/>
<tx:method name="*" isolation="DEFAULT"/>
</tx:attributes>
</tx:advice>
<!--AOP增强-->
<aop:config>
<aop:advisor advice-ref="txAdvice" pointcut="execution(* cn.spring.service.impl.*ServiceImpl.*(..))"/>
</aop:config>
</beans>
修改UserServiceImpl.java
package cn.spring.service.impl;
import cn.spring.dao.UserDao;
import cn.spring.domain.User;
import cn.spring.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service("userService")
public class UserServiceImpl implements UserService {
@Autowired
private UserDao userDao;
@Override
public void saveUser(User user) {
System.out.println("业务层添加方法被调用");
userDao.saveUser(user);
}
@Override
public List<User> findAllUser() {
System.out.println("业务层查询方法被调用");
return userDao.findAllUser();
}
}
修改UserController.java
package cn.spring.controller;
import cn.spring.domain.User;
import cn.spring.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;
@Controller
@RequestMapping("/user")
public class UserController {
@Autowired
private UserService userService;
@RequestMapping("/findAll")
public String findAll(Model model){
System.out.println("表现层查询方法被调用");
List<User> list=userService.findAllUser();
model.addAttribute("list",list);
return "all";
}
@RequestMapping("/save")
public void save(User user, HttpServletRequest request, HttpServletResponse response) throws IOException {
userService.saveUser(user);
response.sendRedirect(request.getContextPath()+"/user/findAll");
return;
}
}
修改index.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<a href="user/findAll">测试查询</a>
<h1>测试保存</h1>
<form action="user/save" method="post">
名称:<input type="text" name="name"/><br/>
年龄:<input type="text" name="age"><br/>
<input type="submit" value="保存"/>
</form>
</body>
</html>
修改all.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<h1>查询所有</h1>
<c:forEach items="${list}" var="user">
${user.name}
</c:forEach>
</body>
</html>
运行
成功了
在resources中添加log4j.properties文件
# Set root category priority to INFO and its only appender to CONSOLE.
#log4j.rootCategory=INFO, CONSOLE debug info warn error fatal
log4j.rootCategory=info, CONSOLE, LOGFILE
# Set the enterprise logger category to FATAL and its only appender to CONSOLE.
log4j.logger.org.apache.axis.enterprise=FATAL, CONSOLE
# CONSOLE is set to be a ConsoleAppender using a PatternLayout.
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern=%d{ISO8601} %-6r [%15.15t] %-5p %30.30c %x - %m\n
# LOGFILE is set to be a File appender using a PatternLayout.
log4j.appender.LOGFILE=org.apache.log4j.FileAppender
log4j.appender.LOGFILE.File=d:\axis.log
log4j.appender.LOGFILE.Append=true
log4j.appender.LOGFILE.layout=org.apache.log4j.PatternLayout
log4j.appender.LOGFILE.layout.ConversionPattern=%d{ISO8601} %-6r [%15.15t] %-5p %30.30c %x - %m\n